Correct! I call this the "cult of the product." If we just build the most awesomest widget possible, everyone will love it and give us money!

Or, "build it and they will come."

Wrong. You need to have market hypotheses and you need to build the smallest test cases possible to try and falsify these hypotheses.

That means instrumentation, a data-driven mindset, and the ability to iterate quickly.

You'll know very quickly if you're sucking. And you probably are.